A closing assembly for a clamping device having first and second jaw members includes a closing mechanism connected between the first and second jaw members, the jaws extending distally from the closing mechanism; and a member for applying a separating force to the first and second jaw members proximally...http://www.google.com.hk/patents/US20060111735?utm_source=gb-gplus-share專利 US20060111735 - Closing assemblies for clamping device
